Answer:
informal is the first sentence and formal is the second sentence.
Students should have to have a certain amount of community service hours to graduate. For one, it would help the community, of course. Second, the students would learn about helping the community. And it would make graduating a little bit more of a challenge, so not just anyone can graduate. If doing community service was mandatory to graduate many people would benefit.
I think i generated a calamity, such as a tornado. or <span>Added to private bereavement</span>
